ILL GIVE BRAINLIEST IF CORECT

D. Makes more copies of a sample of DNA

Explanation:

It is a technique used to amplify a segment of DNA of interest or produce lots and lots of copies. In other words, PCR enables you to produce millions of copies of a specific DNA sequence from an initially small sample – sometimes even a single copy.

depends on if you on plato or not

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.